These are the main folders in this repo:
./BluePic-iOS- Contains the iOS client application../BluePic-Server- Contains the Kitura-based server application and its dependencies. This folder contains the artifacts that are deployed to IBM Cloud../BluePic-Cloud-Functions- Contains the Cloud Functions actions and sequence code written in Swift../Bridge-Scripts- Contains the scripts to be leveraged by the IBM Cloud Tools for Swift../Docs- Contains additional project documentation../Imgs- Contains images referenced in thisREADMEfile.
The following Swift packages are used in BluePic:
- Kitura-CouchDB
- Kitura
- Cloud Configuration
- Swift SDK for IBM Cloud Object Storage Service
- Kitura Credentials plugin for the App ID service
- Swift SDK for IBM Cloud Push Notifications Service
The following diagram captures the architecture for the BluePic app:
Figure 1. BluePic Architecture Diagram.
- A client from an iOS device or web browser connects to the Kitura Mobile Backend
- The clients are optionally able to authenticate. On the iOS devices they leverage the AppID service in Bluemix.
- At this point a client is able to take a picture (on the iOS client) and upload the image (on both clients).
- The Kitura Mobile Backend will first create an entry in a Cloudant NoSQL DB.
- The Kitura Mobile Backend will then store the file in the Bluemix Cloud Object Storage.
- OpenWhisk actions are triggered with Kitura writes into Cloudant DB and Object Storage then triggered. These actions include invoking the Watson Visual Recognition service to analyze the image.
- In parallel, OpenWhisk also gets location data from where the image was taken, from the Bluemix Weather Company Data service.
- OpenWhisk will take the returned data from AlchemyAPI and the Weather Company Data services and update the Cloudant NoSQL DB entry.
- Finally, OpenWhisk will trigger a Bluemix Push Notification event for the iOS client.